/*
 * Copyright IBM Corp. and others 2001
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 */
package org.openj9.test.javaagenttest;

import java.lang.instrument.ClassDefinition;
import java.lang.instrument.Instrumentation;
import java.lang.instrument.UnmodifiableClassException;
import java.util.ArrayList;

import org.testng.Assert;
import org.testng.log4testng.Logger;


public class AgentMain {

	public static final Logger logger = Logger.getLogger(AgentMain.class);

	public static Instrumentation instrumentation = null;

	public static String agentArguments = null;

	public static void premain( String agentArgs, Instrumentation inst ) {
		logger.info("AgentMain.premain() is initilized");
		instrumentation = inst;
		agentArguments = agentArgs;
	}

	public static void redefineClass(Class<?> theClass, byte[] classBytes ) {
		try {
			logger.debug("Class<?> theClass is " + theClass);
			logger.debug("byte[] classBytes is " + classBytes);
			Assert.assertNotNull(theClass, "Class<?> theClass is null");
			Assert.assertNotNull(classBytes, "byte[] classBytes is null");

			ClassDefinition cdf = new ClassDefinition( theClass, classBytes );
			try {
				instrumentation.redefineClasses( cdf );
			} catch (UnmodifiableClassException e) {
				e.printStackTrace();
			} catch ( ClassNotFoundException e ) {
				e.printStackTrace();
			}
		} catch (java.lang.NullPointerException ex) {
			Assert.fail("Unexpected exception occored " + ex.getMessage(), ex);
		}
	}
}
